a. (0,7a+0,3b) (0,7a-0,3b)
3. binomische Formel
(0.7a)^2 - (0.3b)^2 = 0.49·a^2 - 0.09·b^2
b. (2/5x-1/y)2
2. Binomische Formel
(2/(5x))^2 - 2*(2/(5x))(1/y) + (1/y)^2 = 4/(25·x^2) - 4/(5·x·y) + 1/y^2
Fasse zusammen!
a. 7x3-5x2+12x3+4x4+x4-8x2
= 5·x^4 + 19·x^3 - 13·x^2
b. 3(m-2n)-7(4m+n2)
= 3·m - 6·n - 28·m - 7·n^2 = - 25·m - 7·n^2 - 6·n
wende potenzgestze an !
a. (2c2a)2
= 4·c^{4·a}
b. (4n3/2n2)0
= 1
c. 32m*22m
= 6^{2m}
d. 83x/23x
= 4^{3x}
e. 5*104*7*10-1/28*102*100
= 5·10^4·7·10^{-1}/(28·10^2) = 5*7/28 * 10^1 = 25/2